From this detailed guide, you can learn how to install Invidious Addon On Your Kodi.
A privacy-friendly way of watching YouTube content. Uses the great Invidious web service's API to do the heavy lifting. This plugin is not endorsed by Google. is now available through official Kodi repository.
this installation guide applies to all compatible devices including Amazon Firestick, Fire TV, Android & iOS, Mac, Windows, Android TV, Android Boxes, etc.
How To Install Invidious Kodi Addon
- Open Kodi
- Be sure to have the Unknown Source box checked as Kodi requires this before installing 3rd party add-ons.
- HOME Screen > Add-ons > Settings button 
> Add-ons > Enable Unknown Sources.
- From your Home Screen Click Add-ons
- Click the Add-on Browser Icon
- Click Kodi Add-on Repository
- Click Video Add-Ons
- Click Invidious
- Click Install
- Wait for Add-On Enabled Notification
is now installed and ready to use.
The Addon can be accessed by going back to the main screen of Kodi > Add-ons - Video Add-ons
, enjoy.